CardComps — Card Values for eBay

Instant eBay sold-comp fair value + margin on eBay sports-card listings.

CardComps puts a fair-value estimate on every eBay sports-card listing, so you can tell a deal from a trap without leaving the search page. Click the Value button on any listing and CardComps looks up what that exact card has actually been selling for — using eBay's own completed/sold listings — then shows the median price, the range it's trading in, how many sales it found, and your margin against the current bid. WHAT YOU GET • Fair value from real sold comps, not wishful asking prices • Gross and after-fee margin against the current bid/price • Price-over-time chart with a trend line • Grade and Variant dropdowns to re-price the exact card in front of you • Works on search results and on individual listing pages BUILT TO BE HONEST Matching cards is the hard part, and a confident wrong number is worse than no number at all. Before counting a sale as a comp, CardComps checks the release year, print-run serial, autograph status, product line, grade, and parallel. When the comps disagree too much, or there simply aren't enough of them, it says so instead of guessing. PRIVATE BY DESIGN Everything runs inside your browser. There is no server, no account, no tracking, and no data collection of any kind. Nothing you browse is ever sent anywhere.